June 5, 1806, at Camp Chopunnish, Idaho County, Idaho.
The flowers of this lupine are blue or mostly blue, in dense, terminal racemes. Its stems are diffusely branched and are clumped together on a coarse, branching root crown. Leaves are palmately compound, and each narrow leaflet is covered with silky hairs. Height: 1-2 ft (0.3-0.6 m).
Dry to moist valleys and mountains to 7,000 ft (2,134 m) elevation.
Saskatchewan and the Black Hills to northern New Mexico, west to British Columbia, eastern Washington, and Arizona.